Vitamins are complex chemical substances (find) in many foods. The human body needs them for health and
(grow). The body makes some vitamins, but usually in amounts too small to meet its needs.
vitamins are not made in the body. These must __
_(supply). No one knows
(exact) how all vitamins work. Doctors do know that vitamins have very special uses.
, One vitamin cannot take the place of another. The steady absence of one vitamin causes a deficiency disease. Rickets, scurvy, and pellagra are examples_
__ deficiency diseases.
It is best to get vitamins eating the foods in which they occur. There are also pills that contain a single vitamin _
_a combination of vitamins. People should ask their doctors_
__they take any vitamin pills.
Eating habits are different in different countries. The Chinese have a (say) –Eat good things for breakfast, “eat a big meal for lunch, but eat
(little) at dinner. Many Americans agree that one should start the day with a good breakfast,
their ideas about lunch and dinner are
(difference).
Most Americans only give (they) a short time for lunch. So they eat a small lunch. After work they will have more time to eat a big dinner. Also a quiet dinner at home with all the family
(talk) about their day is a way to take
good rest after a long. hard day of work.
Eating at restaurants(be) also different. In China, people like to talk and laugh while eating. Very often you can hear people talking and laughing _
(loud), and they are just having a good time. In America it is not like this. They want a quiet place
they can eat a good meal far away from the noises of the outside world.
阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
Recently a new science behind incentives（激励）, _ （include） in education, has been discussed．For example, researcher Roland Fryer wanted to see what works best in motivating children
_（do） better in school．__
_some cases, he gave students incentives based on input（输入）, like reading certain books, while in
___, the incentives
（base） on output, like results on exams．His main __
_ （find） was that incentives increased achievement when based on input but had no effect when based on output．Fryer’s conclusion was that the incentives for inputs might be
____（effect） because students do not know how to do better on an exam, apart from general rules like “study harder”．Reading certain books, on the other hand, is a well-set task over
__they have much more control．
As long as you have direct control over your goal, you have __ much higher chance of success．And it’s easier to start again
_you fail, because you know exactly what you need to do．
Paper-cutting is a(n) (tradition) Chinese folk art with a long history.
Paper-cuts (use) during festivals to decorate gates and windows. The main cutting tools are simple: paper and scissors or a knife. Clever craftsmen are very good at
________ (cut) in the theme of daily life. When you look at works created by paper cutting
(careful), you will be amazed by the true-to-life
(express) of the figure’s appearance and thoughts.
Although other art forms, like painting, can show similar scenes, paper-cutting still stands out for its beautiful lines and patternsare all hand-made. Learning about cutting a piece of paper
(be) easy but mastering (精通)
is very difficult. One must hold the knife upright (竖直地) and press on the paper without much strength. Any carelessness will lead
damage to the whole image. Craftsmen try
________(create) a circle like the moon, a straight line like a stem(干) of wheat, and a square like a brick. They have to be careful and keep practising to make the scenes seem as alive as possible.
阅读下面短文，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
Canada is a country North America consisting of ten provinces and three territories.
（locate）in the northern part of the continent, it extends from the Atlantic
the Pacific and northward into the Arctic Ocean. Covering 9.98 million square kilometers in total, Canada is the world's second-largest country by total area and the fourth-largest country by land area.
common border with the United States forms the world's longest land border.
Canada is a developed country and one of the (wealthy) in the world, with the tenth highest nominal per capita income
(global), and the eighth highest ranking in the Human Development Index. It ranks among
highest in international measurements of government transparency(透明度), civil liberties, quality of life, economic freedom, and education. Canada is
member of the Commonwealth of Nations,
is furthermore part of several major international and intergovernmental institutions or groupings,
(include) NATO, the G8, the Group of Ten, the G20, the North American Free Trade Agreement and the Asia-Pacific Economic Cooperation forum.
Everyone may have a complex and different process of (grow up). There are many
(influence)factors in a person's growth and development of his personality.
As for me,what has affected me most in my growth and personality is my family and friends, the two （equal） important factors. As we know, children who
(bring up)in a good atmosphere have a better character than those
are not.
(fortune), I belong to the former. Besides, friends in some ways affect me a lot.
we my have many different opinions and personalities, I have really learned something positive from them. In
(conclude), I get lots of valuable things from them. My family offers me warmth and cares,
my friends give me
(strong) and courage. Both of them have influenced me most since I was born.